Flipkart - Repeated Order cancellations by flipkart

I had purchased 'SAMSUNG Galaxy Tab A* * GB RAM ** GB ROM **.* inch with Wi-Fi Only Tablet (Gray)' from flipkart via Order ID: OD****************** for INR **** (prepaid) on **rd Sept ****. On morning of **th Sept **** the order was shipped and was on its way to me. Around **:** A.M my order was cancelled by flipkart without giving any reason whatsoever. Moreover, I was being blamed for order cancellation by Flipkart Support Assistant. Upon calling them to inquire about this, they said that the order was cancelled due to unforeseen circumstances and advised me to place a fresh order. Since, I had bought this tablet during sale, placing a fresh order would've costed me a significantly higher amount. This is not a first incident in which flipkart has dishonored their end of transaction. Several other earlier orders were cancelled in a similar manner without any cause. Being an aspiring PhD scholar, I was excited to finally get a tablet in sale, which would've tremendously helped me in my studies. Now, this cancellation has not only affected me financially but has caused severe mental agony.